`absl::base_internal::ReadLongFromFile` should use `O_CLOEXEC` and handle interrupts to `read`
PiperOrigin-RevId: 477547252
Change-Id: Icc94290511b5071d15584d59dcd9cf6ad7319e2b
diff --git a/absl/base/internal/sysinfo.cc b/absl/base/internal/sysinfo.cc
index d820ce3..da499d3 100644
--- a/absl/base/internal/sysinfo.cc
+++ b/absl/base/internal/sysinfo.cc
@@ -189,12 +189,15 @@
// and the memory location pointed to by value is set to the value read.
static bool ReadLongFromFile(const char *file, long *value) {
bool ret = false;
- int fd = open(file, O_RDONLY);
+ int fd = open(file, O_RDONLY | O_CLOEXEC);
if (fd != -1) {
char line[1024];
char *err;
memset(line, '\0', sizeof(line));
- ssize_t len = read(fd, line, sizeof(line) - 1);
+ ssize_t len;
+ do {
+ len = read(fd, line, sizeof(line) - 1);
+ } while (len < 0 && errno == EINTR);
if (len <= 0) {
ret = false;
} else {
